Solar Grants for UK Manufacturers 2026 | After IETF

Status update — May 2026. The English IETF (closed July 2025) Phase 3 closed to new applications after the Spring 2024 round, following the 2025 Spending Review decision not to extend. Existing awards continue to deliver through 2028. The Scottish IETF is a separate scheme; we have found no open call since its last call closed in March 2025. For English and Welsh manufacturers, the 2026 stack is now the Annual Investment Allowance (AIA) + PPA + SEG, which still delivers 4–6 year payback for most sites without any application risk.

Why solar makes financial sense for UK manufacturers in 2026

Manufacturing is the single largest commercial sector for solar PV in the UK by installed capacity. The reasons are structural rather than ideological. UK manufacturing sites typically combine three things that align almost perfectly with solar economics: large flat or low-pitch roofs averaging 1,500 to 11,000 square metres of usable area, daytime electricity demand running 5 to 7 days a week with most processes between 06:00 and 18:00, and rising exposure to electricity prices as more of the production line gets electrified — induction furnaces, CNC machining, electric injection moulding, electric process heat. The result is that the average UK manufacturer with annual electricity demand above 800,000 kWh now runs solar models that pay back inside seven years before grants and inside five years after them.

The IETF closed in July 2025 with no successor and never funded solar PV. Manufacturer solar economics now rest on self-consumption, the £1m AIA, the 50% special-rate FYA above it, and SEG export income. No grant sits behind a typical manufacturer’s solar project today.

Which manufacturing sub-sectors fit solar best

Solar fit varies by sub-sector. The strongest fits:

• Metal fabrication, machining and assembly (SIC 24–25). Strong fit. The sector has high electricity intensity, predictable daytime profiles and roof-rich premises.
• Food and drink processing (SIC 10–11). Excellent fit, particularly chilled and frozen producers. Refrigeration loads run 24/7 but solar still displaces 60–75% of daytime load.
• Plastics, rubber and composites (SIC 22). Good fit when the site has high injection moulding electricity demand. PSDS does not cover.
• Chemicals and pharmaceuticals (SIC 20–21). Mixed fit. Process-heat loads dominate the carbon picture; solar is a side measure.
• Paper, board and printing (SIC 17–18). Good fit; rising electricity intensity post drying-oven electrification.
• Textiles, leather and apparel (SIC 13–14). Daytime loads suit solar.
• Building products and ceramics (SIC 23). Variable. Heavy-clay producers fit; lighter joinery doesn’t.

Whatever your electricity use, the better answer is normally the Annual Investment Allowance (AIA) with a strong PPA. Most £150k–£500k manufacturing solar projects don’t need a grant at all once you model the corporation tax benefit and a competitive energy supply contract.

Why there is no grant application to prepare

The IETF scored industrial efficiency and fuel-switching projects until its last window shut on 19 April 2024. It closed in July 2025 with no successor, takes no applications and never funded solar PV. What a manufacturer should prepare instead is the capital-allowance claim: a clean asset register separating solar plant from civils, the AIA position for the year, and a PPA or finance quote for comparison.

Battery storage at manufacturing sites

Batteries were never an eligible IETF technology, and the fund is closed, so battery storage at manufacturing sites is funded from capital, finance or a PPA. Batteries firm up self-consumption against weekend operation or shift solar output into evening peak charging windows. Pure energy-arbitrage batteries rarely pay back on their own.

Common manufacturing solar mistakes we see

The biggest single mistake is over-sizing. We see installer quotes that fill 100% of available roof area on the basis that “more solar = more savings”. For most manufacturers, self-consumption falls off a cliff at 110–130% of weekday daytime demand, and SEG export rates do not bridge the gap between 8p/kWh export and 22p/kWh grid avoidance. The right system is normally 75–95% of peak weekday daytime demand, not 100% of roof.

The second is building the business case around a grant. The IETF closed in July 2025 with no successor and never funded solar, so model the project on capital allowances alone.

The third is treating the Annual Investment Allowance (AIA) as an afterthought. We have seen manufacturer board papers where the headline payback figure is 7.5 years on a £450k system — when a properly modelled the Annual Investment Allowance (AIA) benefit drops it to 5.6 years, comfortably below the board hurdle. Models that don’t incorporate the corporation tax benefit are misleading and routinely kill projects that should proceed.

Typical manufacturing solar project profile

For a representative UK manufacturer with 2.4 GWh/year electricity demand, a 4,200 m² rooftop and £580k headline capex, the post-grant numbers we see most often:

• Pre-grant payback: 6.8 years
• the Annual Investment Allowance (AIA) tax relief: £113,000 (25% of net of grant)
• Net cost to client: £339,000
• Annual savings: £92,000
• Post-grant payback: 3.7 years
• 25-year NPV (8% discount): £1.18m

These numbers vary enormously with site profile. The point is that the Annual Investment Allowance (AIA) brings the tax relief into year one and shortens payback; the IETF closed in July 2025, never funded solar and cannot be stacked.

What we do for manufacturer clients

The work splits cleanly into three phases. Pre-application: half-hourly meter data analysis, energy audit, integrated technical design, financial model, board paper. Application: business-case narrative for tax relief or finance, supplier quotes, roadmap update and M&V plan (the IETF closed July 2025). Delivery: project management of the build, milestone draw-down management, post-commissioning M&V. Always check your installer is MCS-certified.

Most manufacturer engagements run 18 to 26 weeks from kickoff to commissioning. There is no grant application stage: the IETF closed in July 2025 with no successor and never funded solar PV. Build is typically 12 to 16 weeks for sub-1MW rooftops. Whether you have a quote in hand or are at the “would this even work for us?” stage, the free funding review takes four minutes and gives us enough to send you a credible eligibility shortlist.